Fetch

The Fetch API provides a way to fetch http resources from the network.

INFO

fetch must be executed within a handler. It will throw an error if it is called outside of a handler.

// this will throw an error
const resp = await fetch('URL_ADDRESS');

export default {
    async fetch(request, env, ctx) {
        // the fetch must be executed within a handler
        // const resp = await fetch('URL_ADDRESS');
        return resp;
    }
}

Timeouts

The default timeout for fetch is 10000 miliseconds (10 seconds). It can be changed by setting timeout in fetch options.

export default {
    async fetch(request, env, ctx) {
        const resp = await fetch('URL_ADDRESS', {
            timeout: 20000 // 20 seconds
        });
        return resp;
    }
}

The function's timeout limit is 30 seconds. If the function timeout is exceeded, the fetch will be terminated.

Limits

• The maximum requests in one function is 5;
• It is possible to fetch another project's resources. But it is danger to call recursive fetch. The maximum depth of recursive fetch is 3.